28 October 2015, 02:36 PM ET
Scientists record sharp voltage increases as feeding electric eels curl their bodies. These electrical discharge immobilize prey by short-circuiting their neuromuscular system, causing extreme muscle fatigue.
27 October 2015, 03:36 PM ET
If an ancient amphibian lost a limb or a tail, it could simply sprout a new one, according to researchers who found fossil evidence of limb regeneration dating back 290 million years.
27 October 2015, 12:25 AM ET
The dingo is a wild, medium-size canine that has roamed Australia for thousands of years.
26 October 2015, 04:43 PM ET
Nearly a million years ago, a cave hyena could have taken down a 5-year-old mastodon weighing more than a ton. And in packs, the predators may have been equipped to demolish a 9-year-old mastodon weighing a hefty 2 tons.
26 October 2015, 03:00 PM ET
Lions are disappearing from large swaths of the African landscape, largely as a result of conflicts with humans and poaching of their prey species, new research suggests.
26 October 2015, 06:58 AM ET
A little more than 200 million years ago, a four-fanged pterosaur flew over the vast desert of Triassic Utah snagging other reptiles with its toothy mouth, until it met its untimely end on the banks of a dried-up oasis, new research finds.
23 October 2015, 10:24 AM ET
Have you heard that expression "better sleep with one eye open?" Crocs may take that advice to heart.
23 October 2015, 12:29 AM ET
The mongoose is a long, furry creature with a legendary reputation as a ferocious snake fighter.
22 October 2015, 12:25 PM ET
It's a tough trade-off for male howler monkeys: a deeper voice, or more sperm?
22 October 2015, 09:32 AM ET
A new study of the species Alouatta caraya has revealed that the deeper the vocalization, the smaller the testicals. This also led to the conclusions that howler monkeys with low-pitch vocalization tended to live in single-male groups.
22 October 2015, 07:28 AM ET
Photographers and researchers from around the world are teaming up to share images of everyone's favorite Halloween mascots — spiders.
22 October 2015, 07:26 AM ET
It's October, and that can mean only one thing: Time to share awesome spider pictures on social media.
22 October 2015, 12:17 AM ET
Impalas are medium-sized antelopes that are native to Africa. They are great jumpers that use their speed to escape predators.
21 October 2015, 02:00 PM ET
Paging Charles Darwin: The island of Santa Cruz within the Galápagos has not one but two distinct species of giant tortoise, a new genetic study finds.
21 October 2015, 06:53 AM ET
When an Apatosaurus dinosaur slapped its impressively long tail onto the ground, other beasts likely listened. Turns out, the long-necked dino may have broken the sound barrier with its tail whips more than 150 million years ago.
21 October 2015, 01:12 AM ET
Goats are among the earliest domesticated animals. Mountain goats live in steep, rocky areas.
20 October 2015, 09:42 AM ET
Using computer modeling, researchers have produced scenarios in which the tails of diplodocid sauropods could have whipped at supersonic speeds. They constructed a 1/4 scale model with 3D printing to test their theory.
19 October 2015, 03:22 PM ET
If humans had never set foot in the Bahamas, the islands today might be teeming with Cuban crocodiles, Albury's tortoises and rock iguanas, a new study finds.
19 October 2015, 07:06 AM ET
An adolescent Tyrannosaurus rex named Jane may settle a dispute more than 70 years in the making: Whether small carnivorous dinosaurs are younger versions of T. rex, or another species altogether, a new study finds.
18 October 2015, 09:43 AM ET
Many species of birds and even mammals, such as the great whales, travel thousands of miles to over-winter in warmer climates. Check out these photos of one of the most spectacular migrations.
16 October 2015, 05:24 PM ET
A mega shark that lived 300 million years ago would have made today's great whites look like shrimps, according to fossils of the beast unearthed in Jacksboro, Texas.
16 October 2015, 11:40 AM ET
The large and bulbous teeth of an early reptile likely helped it crunch beetles and other hard-shelled invertebrates about 290 million years ago, a new study finds.
15 October 2015, 07:45 AM ET
Mammals have been growing hair the same way for 125 million years.
14 October 2015, 02:00 PM ET
A cluster of baby duck-billed dinosaurs was uncovered in a slab of rock from a fossil-rich part of Mongolia known as "Dragon's Tomb."
14 October 2015, 11:17 AM ET
The winner of this year's contest invites you to consider a bee's perspective on the world.
13 October 2015, 04:09 PM ET
Two giant panda cubs were born today (Oct. 13) at the Toronto Zoo, becoming the first pandas ever born on Canadian soil.
13 October 2015, 07:07 AM ET
Almost 30 years after a horrific accident at the Chernobyl Nuclear Power Plant released massive amounts of radiation and became one of the world's worst nuclear catastrophes, many native wildlife species are once again finding refuge in the area.
13 October 2015, 02:30 AM ET
The phrase "busy as a beaver" aptly describes these big-toothed rodents that can change the landscape and their environment.
09 October 2015, 10:10 AM ET
A Michigan farmer unexpectedly discovered mammoth bones on his property, buried in the soil beneath a wheat field.
09 October 2015, 09:31 AM ET
Two Michigan farmers made an unexpected discovery in a wheat field last week: the ice-age bones of a mammoth that was likely slaughtered by ancient humans.
07 October 2015, 07:24 PM ET
A newly described species of rodent has a nose like a cute little piglet, ears that only a mother could love and teeth that would make Dracula run in fear.
07 October 2015, 03:13 PM ET
Scientists have figured out why some species have more females than males and others have more males than females. Turns out, sex chromosomes are the culprits.